Star · M4V
PSO J354.3709+57.7939
PSO J354.3709+57.7939 is a main-sequence star of spectral type M4V in the constellation Cassiopeia, 123.9 light-years from the Sun.
| Constellation | Cassiopeia |
|---|---|
| Distance | 123.9 light-years (38.0 pc) |
| Apparent magnitude | magnitude 24.10 |
| Absolute magnitude | magnitude 21.20 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 5.20 × 10⁻⁶ L☉ |
| Radius | 0.00858 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 23h 37m 29.0s |
| Declination (J2000) | +57° 47′ 40″ |
| Space velocity (relative to the Sun) | 24.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 24.10. Visible from the whole Northern Hemisphere and south to latitude 32° S. North of latitude 32° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1902. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.2 million years.
The Sun seen from there
From a planet around PSO J354.3709+57.7939, the Sun would look like a star of magnitude 7.73, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 58 11.4 light-years
- HIP 112829 16.4 light-years
- HIP 112324 17.0 light-years
- HIP 111854 17.0 light-years
- HIP 117551 17.3 light-years
- GJ 3046 18.2 light-years
- HIP 2364 19.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.